Permutation-lock.



UNITED STATES PATENT oEEioE.

ADOIJPH JOHSTOL'IQr/OF MANISTEE, MICHIGAN.

PERmuTv-ATION-LOCK.

, Permutation-Lockof which the following is a specification. I This invention relates to permutationlocks, and has for its object to provide'av comparatively simple and inexpensive device of this `character particularly designed ,for use as a padlock andwhich vcannot be opened ex-y ceptgby `the owner or other person familiar with -the combination.

A. stillfurtherobjectof the invention is to generally. improve this class of devices so as to` increase their utility, durability, andvefliciency, as well as to reduce the cost of manufacture.

With these and y.other objects inview the invention consists in the construction ,and novel combination and arrangement of parts hereinafter-fully..described, and illustrated in vthe accompanying drawings, it beingunderstood'that various changes in form, proportions, and minordetails of construction may be resorted to .within the scope of the appended claims.

In the accompanying drawings, forming a part of this speciiication, Figure 1 is a side elevation of a permutation-lock constructed in accordance with my invention. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a perspective view of the shackle detached. Fig. `i is a top plan view of the lock with the shackle detached. Fig. 5 is a detailed sectional view of several of the lockingtu'mblers disposed in superposed order. Fig. 6 is a top plan view of one of the tumblers detached, and Fig. 7 is a transverse sectional view'of Fig. 6. V

Similar numerals of reference indicate corresponding parts in all of the'iigures of the drawings.

The device consists of a base-plate 5, provided with vertically-disposed spaced sleeves or collars 6, formed with oppositely-disposed alined longitudinal slots 7 and having smooth exterior walls for engagement with the rotary tumblers 8. The tumblers 8 are preferably circular in form, as shown, and are each provided, at one end. thereof with an inwardlyextending flange 9, having oppositely-disposed alined notches or recesses 10 formed therein for the purpose hereinafter referred to.

Slidably mounted within the sleeves or col- Specification of Letters Patent.

Application led May 21906rl Serial No. 314.871.

.moved to operative position. formed integral with the-shackle 12 are disks l Patenteanec. 25,1906.

lars -6 are the spaced legs 110i a shackle 12, said legs being provided with oppositely-,disposed teeth 13,- adapted to engage-the flanges 9 Iwhen. the-notches `14 register withv the recesses 1Q and the shank is partially rotated, thereby locking the shackle to the base-plate. The exterior walls of the tumblers 8 are printe ed, stamped, or otherwise formed with llet-. ters or symbols 15, while the upper tumbler 8 is countersunk at 16 for engagement with lthe lateral flanges 17 .of the sleeves or collars 6, as shown, so as to retain said tumblers in position on the sleeves. The adjacent faces of the legs 11.are iiat and unobstructed, while the oppositefaces thereof are provided with curved bearing-surfaces 18, adapted to engage v the correspondingly curved interior walls 19 of the sleeves .orcollars 6, whereby. the legs will be guided whenthe. shackle is or c'ollars20, whichserve to limit the downwardk movement of the shackle `and also.

serve -to form a housing for the sleeves or collars, so as to eifectually prevent theL entrance of. dust, water, and other foreign matter within the sleeves. By having the legs of the shackle provided with the curved bearing-surfaces 18 said shackle may be readily reversed and introduced in the sleeves, while by reason of the disposition of the lockingteeth 13 a double gripping-surface is presented for engagement with the iianges on the rotary tumblers.

In order to release the shackle 12, the tumblers 8 are rotated until the letters or symbols forming the desired combination are arranged in alinement and in which position the locking-recesses 10 will be in alinement with each other and with the slots in the sleeves or collars, thus permitting the shackle.

to be readily withdrawn from said sleeves. To loc k the shackle, it is merely necessary to rotate one or more of the tumblers, which causes the iianges 10 of said tumblers to engage the teeth 13, and thus prevent accidental movement of the shackle. i

By forming the tumblers with one or more locking-recesses the combination may be varied, and by extending the bearing sleeves or collars and increasing the numberof locking tumblers the number of combinations may also be increased.

In some cases a single tumbler may be employed on each sleeve, and when the lock is constructed with. a pivoted shackle one of the Secured to ory p IOC sleeves may be dispensed with, the tumbler or tumblers being mounted for rotation on the remaining sleeve in the manner before described.

From the foregoing description it is thought that the construction and operation of the device may be readily understood by those skilled in the art, and further description thereof is deemed unnecessary.

Having thus described the invention, what is claimed is` 1. In a lock, a base-plate provided with a bearing-sleeve having oppositely-disposed alined slots formed therein, a tumbler mounted for rotary movement on the bearingsleeve and provided at one end thereof with an inwardly-extending locking-flange having alined recesses adapted to register with the slots in the bearing-sleeve, and a shackle having a depending leg one wall of which is curved or rounded to conform to the interior walls of the bearing-sleeve and its opposite edges provided with spaced locking-teeth adapted to engage the locking-flange on the tumbler,

2. In a lock, a base-plate provided with spaced bearing-sleeves having oppositelydisposed longitudinal slots formed therein, a

`plurality of tumblers mounted for rotary movement on the bearing-sleeves and each provided at one end thereof with an inwardlyextending locking-ange having oppositelydisposed recesses formed therein and adapted to register with the slots in the bearingsleeves, a shackle provided with spaced depending legs fitting within the bearingsleeves, teeth formed on the opposite edges of the depending legs and adapted to engage the locking-flanges on the tumblers, and collars carried by the shackle and adapted to bear against the ends of said sleeves.

3. In a look, a base-plate provided with integral spaced bearing-sleeves having longitudinallydisposed alined recesses formed therein, a plurality of tumblers mounted for rotation on the bearing-sleeves and cach provided at the top thereof with an inwardly-extending locking-flange having oppositelydisposed recesses formed therein, the locking-ilange of one of said tumblers having its upper face countersunk, a shackle provided with depending legs fitting within the bearing-sleeves and provided with spaced lockingteeth adapted to engage the flanges on the tumblers, said legs being provided with curved bearing-surfaces adapted to engage the interior walls of the bearing-sleeves, said bearing-sleeves having their terminal portions expanded laterally for engagement with the countersunk portion of the acent tumbler, and collars carried by the shackle and bearing against the expanded portions of the sleeves.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signature in the presence of two witnesses.

ADOLPH JOH STOLT. Witnesses:

VICTOR SwANsoN, BERTHA M. LAUTERBACH. 

